CC3220: Can't start own plate with cc3220sf onboard

Shamil Farsiev

Expert 1515 points

Part Number: CC3220

Hi all!
I had designed my own pcb and make it. Designed from datasheet scheme p67.

use same values of capacitors inductors resistors and etc.

check everything twice by twice - same scheme.

but: it doesn't work. i try to start pwm led example from sdk. nothing!

reset work only.

when power on - currency is 3.5mA

all SOP is 0.

where did I f*ck up?

over 7 years ago

0 Hnz over 7 years ago

Guru 39650 points

Hi,

Almost same importance than schematic is a layout of your board with CC3220 chip. It is crucial to follow PCB design rules inside www.ti.com/.../swru458.pdf. If you not follow this rules, that your design will probably not be functional. For example if you use two layers board with CC3220 (not MOD), then I am almost sure that your PCB will failed. Please check www.ti.com/.../swru462 (Design Checklist). Please provide here your schematic and PCB layout. I expects that TI experts will be able look on it.

Few questions:
- did you check voltages at supply pins of CC3220SF QFN chp in comparison with CC3320SF LaunchPad (VDD_DIG, VDD_ANA, etc.) ?
- are you able connect by JTAG from CCS?
- are you able connect by Uniflash via UART (in bootloder mode SOP2=1)?

Jan

0 Toby over 7 years ago

TI__Mastermind 35030 points

Hi Shamil,

Are you able to flash your board with Uniflash?

Regards,
Toby

0 Shamil Farsiev over 7 years ago in reply to Hnz

Expert 1515 points

nothing. just try to led blink and thats all.
pcb file created from pcad200

wifi_btr_sens_production.pcb

0 Jan D over 7 years ago in reply to Shamil Farsiev

Guru 79985 points

Hi,

You need to measure voltages (DCDC_ANA, DCDC_DIGI) at power pins of CC3220 at least. Did you followed design rules at SWRU458?

Please provide your layout and schematic in format which is easier to open (e.g. PDF).

Jan

0 Shamil Farsiev over 7 years ago in reply to Jan D

Expert 1515 points

>>Did you followed design rules at SWRU458?
I tryed. But I have very strict technical specification about pcb size.
Gerber file will be fine?

0 Shamil Farsiev over 7 years ago in reply to Jan D

Expert 1515 points

sorry guys, just this pcb file. pcad2004 can't export gerber or pdf

0 Jan D over 7 years ago in reply to Shamil Farsiev

Guru 79985 points

Hi,

I expect that TI guys should be able open your PCB file by Altium designer. Unfortunately I haven't installed this software. Personally I would prefer PDF export or image in reasonable resolution.

Update: OK, no problem. Please wait for a answer from TI. But as first thing you should check voltages.

Update 2: Please remove Resolved flag, cause your issue is not resolved.

Jan

0 Shamil Farsiev over 7 years ago in reply to Jan D

Expert 1515 points

ok, i will check! can you repeat pins and what U u heve to expect on this pins?

0 Jan D over 7 years ago in reply to Shamil Farsiev

Guru 79985 points

Hi,

I expect that output voltages should be:

- pin 48 @ 1.8V
- pin9 @ 1.2V

Jan

0 Shamil Farsiev over 7 years ago in reply to Jan D

Expert 1515 points

thanks! one hour and answer here.

0 Shamil Farsiev over 7 years ago in reply to Jan D

Expert 1515 points

- pin 48 @ 0.6V - fail!
- pin9 @ 1.2V - ok!

0 Jan D over 7 years ago in reply to Shamil Farsiev

Guru 79985 points

Hi,

OK, it looks to design or manufacturing issue. Your DC-DC is not working properly. Unfortunately I haven't more advice. Please wait for answer from TI hardware expert.

Jan

0 Shamil Farsiev over 7 years ago in reply to Jan D

Expert 1515 points

thanks! i tried to over up capacitors 10uF - and voltage became from 0.6 to 0.8V.

0 Jan D over 7 years ago in reply to Shamil Farsiev

Guru 79985 points

Hi,

Please open new thread with summary of all information and your voltage measurements. TI guys will have better chance find your question and follow to right person.

Jan

0 Shamil Farsiev over 7 years ago in reply to Jan D

Expert 1515 points

ok! thx!

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CC3220: Can't start own plate with cc3220sf onboard